<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8"> 
<title>菜鸟教程(runoob.com)</title> 
<style> 
div
{
    width:100px;
    height:50px;
    background:red;
    color:white;
    font-weight:bold;
    transition:width 2s;
    -webkit-transition:width 2s; /* Safari */
}

#div1 {transition-timing-function: linear;}
#div2 {transition-timing-function: ease;}
#div3 {transition-timing-function: ease-in;}
#div4 {transition-timing-function: ease-out;}
#div5 {transition-timing-function: ease-in-out;}

/* Safari */
#div1 {-webkit-transition-timing-function: linear;}
#div2 {-webkit-transition-timing-function: ease;}
#div3 {-webkit-transition-timing-function: ease-in;}
#div4 {-webkit-transition-timing-function: ease-out;}
#div5 {-webkit-transition-timing-function: ease-in-out;}

div:hover
{
    width:300px;
}
</style>
</head>
<body>

<p><b>注意:</b> 该属性不兼容 IE 9 以及更早版本的浏览器</p>

<div id="div1" style="top:100px">linear</div>
<div id="div2" style="top:150px">ease</div>
<div id="div3" style="top:200px">ease-in</div>
<div id="div4" style="top:250px">ease-out</div>
<div id="div5" style="top:300px">ease-in-out</div>

<p>将鼠标移动至块上查看过渡动画效果.</p>

</body>
</html>